Sonic Chaos: Level select
Press [Up]x2, [Down]x2, [Right], [Left], [Right], [Left] when "Press Start" appears at the Sonic Chaos title screen.
Sonic Chaos: Instant Chaos Emeralds
Press [Up], [Down], [Up], [Down], [B], [A], [B], [A], [B], [A] at the Sonic Chaos character selection screen.
Sonic Chaos: Sound Test
Press [Down]x2, [Up]x2, [Left], [Right], [Left], [Right], [B], [A] at the Sonic Chaos title screen.
Sonic Chaos: Extra continues
In the first Turquoise Hill Zone mission, press [Up] + [A] to make Tails fly to the top of the screen. Stay there until the CPU makes you get down. When your points are getting added up, you should get three to four continues.
Sonic Labyrinth: Level select
Press [Up]x2, [Right]x3, [Down]x6, [Left]x9 when "Press Start Button" appears at the Sonic Labyrinth title screen.
Sonic Spinball: Level select
Enter the "Sound Test" option for Sonic Spinball . Then, play the following songs in order: 0, 2, 1, 5, 6, 6.
Sonic Spinball: Faster background music
Enter the "Sound Test" option for Sonic Spinball . Then, play the following songs in order: 0, 4, 2, 5, 5, 7.
Sonic Spinball: Disable gravity
Enter the "Sound Test" option for Sonic Spinball . Then, play the following songs in order: 0, 9, 0, 1, 6, 8.
Sonic Spinball: Zoomed in view
Enter the "Sound Test" option for Sonic Spinball . Then, play the following songs in order: 0, 2, 1, 1, 6, 6.
Sonic The Hedgehog 2: Level select
At the Sonic The Hedgehog 2 title screen, Tails will blink his eyes (first once, then two times quickly). While holding [Down/Left] + [A] + [B], tap [Start] just when his eye shuts on the second blink of the double-blink.
Sonic Triple Trouble: Level select
Hold [Up] when the Sega logo appears. Wait until Knuckles touches the red emerald then quickly press [Start].
Two player Game Gear mode
Press [Start] on controller two to display a second Game Gear screen for that player. If the original Game Gear game supported the multi-player link, the current game will switch to multi-player not. If the game did not support the multi-player link, game play on each screen will be unrelated.
Toggle Game Gear game screen
To view the Game Gear games in a smaller, not pixelated view, press [L] + [R]. Pressing [L] + [R] again will return the view back to normal.
In-game reset
Hold [Start] + [A] + [B] + [X] for a few seconds during game play.
Zoom in and out of Chao Gardens
Go to mission mode and select Big. Go to the Chao Garden. Cast your fishing pole into the water and reel in your line. Press [Y] + [L] to zoom out, and [Y] + [R] to zoom in. If this does not work, pet a Chao then do it. This can be done in all three Chao Gardens. Note: This does not work in adventure mode.
Game Gear games
Each time you complete ten missions or collect Sonic Emblems, you will unlock a new Sonic mini-game. After unlocking the first mini-game, Sonic The Hedgehog, the "Mini Game Collection" option will appear as a play mode at the main menu.
There are a total twelve Game Gear games. They are unlocked as follows:
0 to 100 Emblems: One Game Gear game for every 20 Emblems.
100 to 130 Emblems: One Game Gear game for every 10 Emblems.
0 to 60 missions: One Game Gear game for every 20 missions.
Tails Adventure is unlocked for getting the other 11 missions.
The games are unlocked in the following order:
Sonic 1
Sonic Drift 1
Sonic Chaos
Sonic Spinball
The order then varies from here onward for: Sonic Labyrinth, Sonic 2, Dr. Robotnik's Mean Bean Machine, Sonic Triple Trouble, Sonic Drift 2, Tails Skypatrol, Sonic Blast, and Tails Adventure .
Play as Super Sonic
Complete the game using all six starting characters to unlock Super Sonic. Sonic will transform into Super Sonic after some time into the next game.
Play As Metal Sonic
Collect all 130 Emblems to unlock Metal Sonic in trail mode.
Play as Tails
Controller two may be used for Tails after he is obtained during game play in story mode. Note: Shields, invincibility and extra life boxes have no effect on Tails if collected. Note: If Tails goes too far away from Sonic, he will appear next to Sonic.
Mission mode
Successfully complete the game in adventure mode with all characters to unlock the "Mission Mode" option at the main menu.
Glitch: Man falls through floor
After you complete the game, go to the burger shop. You will find a man with his arms out. Press [B] next to him to pick him up. Go into the burger shop and stand in front of one of the tables. Press [B] again to drop him. Instead of standing still, he will fall through the floor and will appear outside. If this did not happen, exit the screen and return.
Glitch: Die after defeating Egg Hornet
When playing as Sonic, fight the Egg Hornet. When it is down to its last hit, let Eggman drill into you. Do not get any rings back. Deliver the last hit and wait for the machinery to fall off the Egg Hornet. After that, jump up and hit Eggman. Sonic will say "No", then the game will total up your points. However, Sonic will faint as he says "Hey, I'll play with you some other time" and die. Note: You will have to fight the Egg Hornet again if this happens. This also works during trail mode.
Glitch: Kill Perfect Chaos without Super Sonic
Make sure you only have about five rings remaining when you do this. As Super Sonic, ram yourself into Perfect Chaos with only one ring remaining and you will turn back into Sonic inside Chaos. If he only has one health, he will die, then you will die.
Glitch: Floating dash panels
When at Emerald Coast as Sonic, go to the part where he is chased by the whale. Slow down a slightly, and you may notice that the whale is destroying the bridge, but the dash panels remained unharmed and will remain floating in air.
Glitch: Tails in Emerald Coast
As Tails, go to Station Square. Go to the pool at the hotel. When you get to the pool, there is a corner that is underneath a balcony. Note: This next part may be easier with the jet anklet. Go to that corner and try to walk into it. When you are underneath, fly up and do not move the Analog-stick. If done correctly, you will go through the balcony. Quickly go through the wall and fly to the entrance to Emerald Coast. Do not go back through the wall. If you do not go to Emerald Coast, but are on the beach, do not jump or go away from the gate or you will die and must start again. Just walk to the gate and you will enter Emerald Coast. Note: You cannot go to Windy and Ripply. There is only blue haze and a useless spring. You will fall and go back to the pool.
Glitch: Stay underwater forever
Note You need the Life Belt for this to work and can only be done in mission mode. Select Big and enter the sewer part underneath where Tails gets his Jet Anklet. Hold [A] so that Big stands on the bottom of the sewer and cast your lure (with [A] still held). Next, move the lure about and reel it in until you get a view of Big. You will see that some of his head is underwater as he is sitting down and he will not drown.
Glitch: Tornado jump
On the final battle, when Chaos sends out tornadoes, jump if you see one appear and Chaos will be hit. Note: This is extremely difficult to do.
Glitch: Incomplete Master Emerald
Complete every characters' adventure. Go to the Master Emerald as any character except Knuckles. You will see that the Emerald is completely restored. Then, go to the Master Emerald as Knuckles and it will look like a piece of it is still missing.
Glitch: Break through barrier
When you reach the end level and are off your snowboard, Spin Dash many times with different amounts of speed to break through the invisible barrier. When your at the start of the level and reach the part where your going to snowboard, run as far as you can to the bottom until you see a jump pad on a hill (jump pad #2). Go on to it and press [A] repeatedly. You should be able to jump from there.
Glitch: Floating Angel Island
Go to Angel Island. Look down with the [C-stick] at the bridge or the edge of Angel Island. You will see that Angel Island is floating.
Glitch: Egg Carrier: Cling onto door opening
Go to the Egg Carrier as Knuckles. Run as fast as you can and glide towards a door. Keep gliding towards it when it opens. As the screen fades to black before you enter the room, you should see that Knuckles actually clings onto the black opening as if it was an obstacle.
Glitch: Egg Carrier: Chaos Emerald changes color before landing
When the Tornado lands on the Egg Carrier, the Chaos Emerald changes from red to white, then back to red.
Glitch: Mystic Ruins: Enter Icecap without climbing ladder
Go to the icy part of the Mystic Ruins as Tails. Approach the ladder as close as possible, but not too close or else you may grab onto the ladder when you jump. Then fly up (providing that you have not grabbed onto the ladder) and you may enter Icecap without climbing up the ladder.
Glitch: Mystic Ruins: Die while climbing
As Knuckles, climb up and down Big's tree near his house at the Mystic Ruins jungle. You will eventually hear and see a splash of water. Tiny bubbles will also rise from Knuckles. Stay there for awhile and the drowning music and counter will start. Let it finish, and you will fall off the tree and drown in mid-air.
Glitch: Mystic Ruins: Death rocks
Go to the Mystic Ruins as Knuckles. Go to the rocks in front of the ice cave. Run into the rocks at your highest speed. If your view changes so you cannot see Knuckles, you should hear him dying.
Glitch: Speed Highway: Pass through obstacles
When running down the wall in Speed Highway, press (and do not hold) [B] to do a Spin Dash. Sonic will roll and you can pass through obstacles.
Glitch: Station Square: Strange sound
As any character in adventure mode, go to Station Square's City Hall. Move through the path of trees to the left and you will hear the sound of glass breaking. If you hear it and want to hear it again, repeat the process.
Glitch: Super Sonic: White Sonic
While in the Super Sonic level, reach the part where Sonic falls asleep. If you (in the flash back) jump into the fire, it should not hurt you. While in the fire, charge up until Sonic says "Ready" and wait until the fire goes around to you. Sonic will turn white for a little while.
Glitch: Wind Valley: Enter without going into level
When you are about to first enter Wind Valley, place the Wind Stone on the key slot. Before the stone is completely placed, jump onto the area that sends you to the level, so that your character is floating in air. When the stone is completely placed, instead of your character going into the level, he or she will still be floating in air, and you will still enter the level.
